Machine for the rotary shearing of metal or the like



June 13, 1950 G. M. HAMBLETON, sR., ETAL 2,511,058 MACHINE FOR THE ROTARY SHEARING OF METAL OR THE LIKE Filed March 29, 1947 4 Sheets-Sheet l I LL I [NVEN TORs Gerald M Hamb/gtqn 5r.

Ra bertGJfemI-Ich June 13, 1950 G. M. HAMBLETON, sR.. ET AL 2,511,058

MACHINE FOR THE ROTARY SHEARING 0F METAL OR THE LIKE 4 Sheets-Sheet 2 Filed March 29, 1347 5 WWW M m M m5 mm .a H M. 6

June 13, 1950 ca. M. HAMBL'TON, sR., ETAL 2,511,

MACHINE FOR THE ROTARY SHEARING 0F METAL OR THE LIKE 4 Sheets-Sheet 3 Filed March 29, 1947 Gerald M. R0.

G. M. HAMBLETON, sR., ETAL 2,511,053 MACHINE FOR THE ROTARY SHEARING June 13, 1950 Filed March 29, 1947 OF METAL OR THE LIKE 4 Sheets-Sheet 4 Patented June 13, 1950 UNITED MACHINEFOR. THE ROTARY SHEARING OF METAL OR THELIKE Gerald M. Hambleton, Sr., and Robert Gr;

Heinrich, Rochester, N. Y.

Application March 29, 1947, Serial No. 738,122

14 Claims. 1.

This invention relates to the rotary shearing of metal or the like. and. more particularly to a machine for shearingsheet metal stock of either coilor sheet form- In the manufacture-of sheetmetal of either the ferrousor non-ferrous type, the rolling mills utilize machines whichshear or. slit. the sheet stock into a number of strips. All of. these machines, however, are;designed to handle a. definite sheet width and are usually. catalogued as an 18, 2.4, or 36 inch machine. While an 18inch sheet could be shearedor slit on a 24 inch machine, a 24 inch sheet could not be. sheared ori-slit. on an 18 inch machine. This-is. due to thearrangement of the bearing, for the arbors which carry the cutters.

The bearings are usually carried. in an integral block for'both theupper and lower arbors or in separate blocks which are locked together when the arbors and cutters are, in the shearingv position. These machines are also of such a size that the ordinary small machine shop cannot afford to install such a machine, and, as a result, must resort to the use of a vertical single stroke type of metal shearer.

In a great many instances, a manufacturer orders sheet metal-in 18,24, or 36 inch widths and then finds that these sheets must be slit or sheared tosome smaller width for punch, press parts, etc. While small lengthsheetsmay be sheared by a vertical shearer, the time necessary for shearing a large number of sheets isboth costly and time consuming. To this end. the. arrangement of the various elementsof our. invention solves the above shortcomings and. at the same, timepermits the manufacture of a machine of relatively small cost.

The primary object-of the invention is to providea machine for the shearing and/or slitting of sheet metal stock in which, any width, and length ofsheet may be sheared- I Aiurther object of the invention is to provide azmachine for the shearing. and/ or slitting of sheet metal in; which the bearings for the. upper and lower arbors uponwhich the cutters are mounted are independent of, each other.

Another objector:- the invention is to-provide a machine for the shearing and/or slitting of sheet metal in whichthe bearings for oneend of the upper andlower. arbors are separatedto provide an unobstructed passageway for the metal being sheared.

And-yet. another object of the, invention is to provide a machine for the shearingof metal in which the bearingmembers for,- one. end of the arborsbe easily-removed for replacement of the cutters andeas-ily and accurately returned totheir; original positions.

A still further object: of the invention is to provide a machine. for the shearing of sheet metal in which the upperarbor is adjustable with respect to'the lower arbor opposite directions.

And still a further object of the invention, is, to provide a machine forv the shearing of sheet metal inwhich a pair of rolls aremounted near. the arbors and cutters for flattening themetal andremoving the burr, if. any, after. passingv through the cutters.

A further object of the invention istoprovide amachine for the shearingof sheet metalwhich is relatively simple in construction, easy to operate, and relatively inexpensive to manufacture.

These and other objects of. the inventionwill be apparent from the description which. follows:

The objects of the invention are embodied. in a machine for the. rotary shearingof sheet. or, coiled sheet metal comprising abed. platehaving a vertical upright section in whichone endoian arbor on which cutters are. mounted is journalled. The other end of the arbor is journalled. inQa removable and adjustable bear-ingmember mounted onthe bed plate. One end of the upper. arbor which is vertically aligned Withthe. lower. arbor is. journalled in a'vertical extension of a horizontal member which is secured to the vertical sectioncn the bed plate. The other. endof the-upper arbor is journalled in a bearing plate which. is. pivotally located on the horizontal member. A motor through a variable speed gear boxdrives the lower arbor, and the upper arbor. is connected. thereto by an endless chain for driving the arbors in A set of. rollsare mounted in spaced relationto the arbors-forfiattening. the burrs on the metal. after it hasbeen sheared.

Reference is now made tov the. accompanying drawings wherein similar reference characters designate similar parts and wherein:

Fig. 1 is a front elevationof themachine em.- bodying the invention;

Fig. 2 is a plan view of. the machine;

Fig. 3. is a side. elevation of the machine with the flattening rolls removed for clarity;

Fig. lis a side elevation of the flattening. rolls;

Fig. 5. is a diagrammatic viewshowinga possible arrangement of; the cutters and spacers on the upper and lower arbors;

Fig. 6 is a view taken. substantially onthe line 6-6 of Fi 1;

Fig. '7 is a view taken substantially on the line 1-! of Fig. 2;

Fig. 8 is a view takensubstantially on the line Fig. 9 is a view taken substantially on the line 9 9 of Fig. 4; and

Fig. 10 is aviewtaken substantially. on. the line lii iil of Fig. 1.

In the illustrated embodiment. of the invention, the bedplate' l is provided with the extensions 2 and lugs 3 for securing: the bedplate l by'means of the bolts 4 to the top-5 of the mounting frame 6; A-motor 1- ismounted on-the crossplate 8. The bed plate I- has integral therewith. or secured 3 thereto a vertical section 9, the purpose of which will be described hereinafter. The bedplate l is provided with a slot I9 and grooves II for the bearing member l2 which is provided with tongues I3 for engaging the grooves II. The bearing member I2 is slidable and adjustable in the grooves II and locked in position by means of the bolt I4. The bearing member l2 has journalled therein the one end I5 of the lower arbor I6 which has its other end [1 journalled in the vertical section 9 and the plate I8.

The upper arbor I9 which is vertically aligned with the arbor I6 and spaced therefrom is mounted in the horizontal bearing member, designated broadly by the numeral 29, which comprises the horizontal section 2| which is substantially parallel to the bedplate I and a vertical portion 22 which has a tongue portion 23 for engaging the cut-out portion 24 in the vertical section 9 and is secured in position by the bolts 25 and the locating pins 26. The end 21 of the arbor I9 is mounted in the sleeve 28 carried in the block 29 which is adjustably mounted in the bearing plate 39 by means of the adjusting screw 3I. The bearing plate is milled out, as indicated by the numeral 32, and is provided with a slot 33 which is engaged by the tongues 34 on the block 29, see Fig. 10.

The locating means for the bearing plate 39 comprises the dowel pins 35 which are fixed to the horizontal section 2| and which are accurately located for mounting the plate 39 in proper spaced relation to the bearing member I2 to provide a free passageway, indicated by the numeral 36, for the metal being sheared.

For the purpose of removing the cutters 31 and the spacers 56 from the arbor I9, as will be more fully described hereinafter, the plate 39 is maintained in its supporting position by the hinge plates 39. The hinge plates 38 are secured to the bearing plate 39 by means of the bolts 39 or by welding thereto and are provided with slots 49 through which the bolts 4I extend to secure the plate 39 in position.

The bearing means for the end 45 of the arbor I9 is similar to that for the end 21. The tongue portion 23 of the vertical section 22 is milled out, as indicated at 32 in Fig. 1, and provided with a slot 46 for the extensions 41 on the block 49. The block 48 is provided with a sleeve 49 through which the end 45 of the arbor I9 passes. With this arrangement for mounting the arbor I9, all the parts associated therewith can be assembled as a unit for mounting on the vertical section 9.

The cutters 31, as shown in Fig. 5, are mounted on the arbors I6 and I9 with spacers 59 therebetween and clamped in position by the collars 5I which are turned on the threaded portions 52 of the arbors I6 and I9. As shown in Figs. 1, 2, and 3, a guide plate 53 is mounted on the vertical section 9 and the posts 54 for guiding the sheet metal into the rotating cutters 31. The plate 53 is provided with guide members 55 which are adjustable by means of the bolt 56 along the slot 51. This provides a fixed guideway for the operator to direct the sheets of metal to be sheared ino the cutters 31. When sheets are to be sheared that are wider than the length of the arbors l6 and I9, the outer guide is removed and the sheet will then pass between the bearing plate 33 and the bearing member I2. With this openend arrangement for supporting the ends I5 and 21 of the arbors I6 and I9, respectively, the cutters 31 can be mounted on the arbors for first shearing a number of excessively wide sheets of metal or the like to a suitable width, or multiple width of the desired size, for easier handling, and then rearranging the cutters 31 to shear the narrow width sheets into the still narrower desired widths. Since the method of shearing sheet metal by the use of rotary cutters is well-known to those skilled in the art, it is not deemed necessary to enter into any discussion of the actual theory of the shearing action aside from the fact that the cutters 31 on both the arbors I6 and I9 are adjusted so they are tangent to a common line, see Fig. 5.

The above described arrangement for the end bearings of the arbors I6 and 19 also lends itself to quick removal and remounting of the cutters 31. By simpl loosening the bolt I4, the bearing member I2 can be slid ofi the bed plate I with the end I5 of the arbor I6 fully exposed for removing or replacing the cutters 31. In a like manner, by releasing the bolts M, the bearing plate 39 may be pulled forward off the locating dowels 35 and then swung about the bolts 4 I, as indicated in Fig. 3, to a position of rest on the horizontal section 2I thereby exposing the end of the arbor I9 for removing or replacing the cutters 31. When the plate 39 is returned to its bearing position the dowels 35 assure proper locating of the plate 39 with respect to the bearing member I2.

Inasmuch as the cutters 31 must be reground periodically to maintain good shearing action, their diameter is usually decreased by several thousands of an inch as a. result of the regrinding. To provide for this variation in cutter diameters, the arbor I9 is adjusted with respect to the arbor I6 by means of the screws 3| which are secured to the blocks 29 and 48 for raising or lowering the blocks in the slots 33 and 46, respectively.

Coming now to the drive means for the arbors I6 and I 9, the motor 1 which may be of the multiple or variable speed type has fixed to its shaft 69 a sprocket 6I. The end I1 of the arbor I6 has keyed thereto, adjacent the plate I8, a sprocket 62. An endless chain member 63 encircles the sprockets 6| and 62 to drive the arbor I6 directly from the motor 1, see Fig. 1. The end 45 of the arbor I9 also has keyed thereto a sprocket 64 which is driven by a Second endless chain member 65 which also encircles the idler sprockets 66 and 61 and the sprocket 13 on the end I1 of the arbor I6 between the plate I8 and the vertical section 9 to drive the arbors in opposite direc tions. The idler sprocket 61 is mounted between the plate I8 and the vertical section 9 on the shaft 68 which is journalled in the plates 69 and 19. The plate 69 is adjustably mounted on the vertical section 9 while the plate 19 is adjustably mounted on the bearing plate I8 by means of the bolts 1I engaging the slots 12. With this arrangement for mounting the sprocket 61, any difference in the center distance between the arbors I6 and I9 due to variation in cutter diameter, which will cause a slack in the chain member 65, can be readily adjusted for by changing the horizontal position of the sprocket 61.

When sheet metal is sheared by means of rotary cutters, the metal after being sheared sometimes has a burr and is not flat sideways. To correct this condition a pair of burring rolls 15 and 16 are mounted on the bed plate I beyond the arbors I6 and I9. The lower roll 15 has a reduced portion 11 and a bearing sleeve 19 and is journalled in the bearing member 19 secured to the bed plate I by the bolts 89. The other reduced portion 8I of the roll 15 also carries a sleeve; 18. and? is.- journalled in theextension- 83 of: the: vertical section, 9.. The reduced-portion 8]: extends beyond; the. extension 83' and. is also journalled' in a, supplementary bearing. member 84 for the sprocket 85'which is keyed to theportion 8]. An. endless chain member 88' encircles the sprocket 85 and a third sprocket 81- mountof' the arbor IE to drive the roll E5.

The upper roll it is. also providedwith reduced portions 9.0 andifil. Theportion 9.0 hasa bearingi sleeve 92 and. is journalled in the block.93, see Fig. I. Theblock 93 iaprovidedwith grooves 94' for'engaging the tongues 95' in the U-shaped member 96; see Fig. 6. The block 93'rests on the coil spring'9'l andpisheld in positionby the plate 98 secured to the member 96 by the screws. I911. The block 96is held. in position on the. bearing member 19 by the latches IDI which are. secured in positionby'the bolts. I82, see. Fig. 4;

The portion 91 of. the roll it also carries a bearing sleeve 92 and is journalled in the. block member. N33; The block- I03 is pivotally mounted between the supporting members HM- by the pins I 05; The members llil'areprovided with grooves I06 for slidably engagingthe tongues it? on the extension 83, and are supported on the extension 83 by the springs I68. A plate m8 is provided with. an arcuate. cut-out Hi1 and tends to maintain the members. HM. in. position. The adjusting screw. Mil in the plate 98 and the adjusting screws M2 in the plate [199; maintain the block, 9.3. and the members. I04, respectively, in proper position so thatthe rolls. and 16' are in proper intimate contact: By adjusting the screws H! and. H2, the pressurewith which the roll it contacts the rol1'l5', and hence-the metal being; sheared, may be varied...

It' willbe'noted from: Fig: 2' that. the. rolls 715 and 16 are approximatelythe same length as the arbors lfivandl it. When wide sheets are. being sheared, the bolts Hi2 are released, the latches It! removed: from; engagement with. the bolts I02 and the upper'rol-l'lt swung upward and into the a-rcuate cuteout portion i 59in the plate i {35. The. roll 16 then carries with it the; U -shaped member 56, the block 93; the spring and. the plate 98, andno obstruction: then remains in the way of the sheet 'beingJsheared'. The roll 15 now acts as a supportfor; the sheared sheet.

Since other modifications of the construction shown are possible, the scope of: the inventionis not to be; limited to theillustra-ted embodiment but is defined by the appended claims.

We claim:-

1. Ina machine for: the rotary shearing of metalior the like,.the combinationqcomprising. a bed plate forsaidzmachine havinga vertical un right seetionthereon, bearing; means. mounted on said bed plate, an-arborjournalled in said ver tical section and-saidbearing means for men t inga setof .cuttersthereon, a second arbor tically aligned with said first arbor for mountingasecond set of cutters thereon, a supper-t member having a vertical portion detach? ly mounted onsaid vertical section and a hOXlZQl portion-extendingrfrom said vertical. portion palallel to said bed plate, a second bearing. means mounted inthe vertical portion of' said suppe member for one end of. said secondarbona ti? bearing meansfor. theother end of said. secor arbor mounted on said horizontal. section. and spaced. from said. bearing means to permit the metal being. sheared. to. pass therebetween,. and means connecting said. first. and second. arbors for driving said arbors in opposite directions.

'2. In a machine for the rotary shearing, of metal or thelike, the combination comprising a bed plate. for said machine having a vertical upright section thereon, a bearingmember mounted on. said bed plate, an arbor iournalled in said vertical section and saidv bearing member for mounting a set of cutters thereon, a second arbor vertically. aligned with said first arbor for mounting a second set of cutters thereon, a support member having. .a vertical portion detachably mountedxon said vertical section and a horizontalportion extendingfrom said vertical portion'parallel to said bed plate, a bearing means mounted in the vertical portion. of said support member for one end. of said second arbor, a bearing plateifor' the other end of said second arbor mounted on said horizontal section and spaced from said bearing member to permit the. metal beingsheared to pass therebetween, means on the horizontal portion of said support member for locating said bearing plate, and means. connecting'said first and second arbors for driving said arbors in opposite directions.

3. In a machine for the rotary shearing of metal or-the like, the combination-comprising a bedplate for said machine having vertical upright section thereon, a bearing member mounted on said' bed plate, an arbor journalled. in said vertical section and said bearing member for mounting a set of cutters thereon, a second arbor vertically aligned with said first arbor for mounting a" second set of cutters thereon, a support member having a vertical portion detachably mounted on-said vertical section and a horizontal portion extending from said vertical portion parallel to said bed plate, a support plate. mounted on said horizontal section and spaced from said bearing member topermit the metal being sheared to pass therebetween, bearing means mounted in the vertical portion of said support member and in said support plate mounting said second arbor in spaced-relation with respect to said first arbor, means on the-horizontal'portion of said support member locating said support plate in a predetermined position, and means connecting said first and second arbors for driving said arbors in opposite directions.

4'. In a machine for the rotary shearing of metal or the like, the combination. comprising a bed plate for said machine having a vertical upright section thereon, a bearing member mounted on said bed plate, an arbor journalled in said vertical section and said bearing member for mounting a set of cutters thereon, a, second arbor vertically aligned with said first arbor for mounting a second set of cutters thereon, a support member having a vertcal portion detachably mounted on said vertical. section and a horizontal portion extending from said vertical por tion parallel to said bed plate, a support plate mounted on said horizontal section and spaced from said bearing member to permit the metal beingsheared to pass therebetween, bearing means a-djustabl'y mounted in the vertical portionof saidsupportmember and in said support plate mounting said second a-r-bor in spaced relation with respect to saidfirst arbor, means on the horizontal portion of said support member locating said support plate in a predetermined position, and means connecting said first and second arbors for driving said arbors in opposite directions,

5. In a, machine for the rotary shearing; of metal or the like, the; combination comprising a bed plate for said'machine having a vertical upright section thereon, an adjustable bearing member mounted on said bed plate, an arbor journalled in said vertical section and said bearing member for mounting a set of cutters thereon, a second arbor vertically aligned with said first arbor for mounting a second set of cutters thereon, a support member having a vertical portion detachably mounted on said vertical section and a horizontal portion extending from said vertical portion parallel to said bed plate, a support plate mounted on said horizontal section and spaced from said bearing member to permit the metal being sheared to pass therebetween, bearing means mounted in the vertical portion of said support member and in said support plate mounting said second arbor in spaced relation with respect to said first arbor, means on the horizontal portion of said support member locating said support plate in a predetermined position, means carried by said support member and said support plate for vertically adjusting the bearing means of said second arbor, and means connecting said first and second arbors for driving said arbors in opposite directions.

6. In a machine for the rotary shearing of metal or the like, the combination comprising a bed plate for said machine having a vertical upright section thereon, a bearing member mounted on said bed plate, an arbor journalled in said vertical section and said bearing member for mounting a set of cutters thereon, a second arbor vertically aligned with said first arbor for mounting a second set of cutters thereon, a support member having a vertical portion detachably mounted on said vertical section and a horizontal portion extending from said vertical portion parallel to said bed plate, a support plate mounted on said horizontal section and spaced from said bearing member to permit the metal being sheared to pass therebetween, bearing means mounted in the vertical portion of said support member and in said support plate mounting said second arbor in spaced relation with respect to said first arbor, means on the horizontal portion of said support member locating said support plate in a predetermined position, means carried by said bearing plate retaining said bearing plate in a hinged relationship with said horizontal portion, and means connecting said first and second arbors for driving said arbors in opposite directions.

7. In a machine for the rotary shearing of metal or the like, the combination comprising a bed plate for said machine having a vertical up right section thereon, a bearing member mounted on said bed plate, an arbor journalled in said vertical section and said bearing member for mounting a set of cutters thereon, a second arbor vertically aligned with said first arbor for mounting a second set of cutters thereon, a support member having a vertical portion detachably mounted on said vertical section and a horizontal portion extending from said vertical portion parallel to said bed plate, a bearing plate for the other end of said second arbor located on said horizontal section in spaced relation from said bearing member to permit the metal being sheared to pass therebetween, locating means on the horizontal portion of said support member for said bearing plate, means carried by said bearing plate and pivotally connected to said horizontal portion retaining said bearing plate on said locating means during the shearing of said metal and retaining said bearing plate in a hinged relation with said horizontal portion during the withdrawal of said bearing plate from said locating means for the removal of said cutters from said second arbor, and means connect ing said first and second arbors for driving said arbors in opposite directions.

8. In a machine for the rotary shearing of metal or the like, a vertical upright section thereon, a bearing member mounted on said bed plate, an arbor journalled in said vertical section and said bearing member for mounting a set of cutters thereon, a second arbor vertically aligned with said first arbor for mounting a second set of cutters thereon, a support member having a vertical portion detachably mounted on said vertical section and a horizontal portion extending from said vertical portion parallel to said bed plate, a support plate mounted on said horizontal section and spaced from said bearing member to permit the metal being sheared to pass therebetween, bearing means adjustably mounted in the vertical portion of said support member and in said support plate mounting said second arbor in spaced relation with respect to said first arbor, locating dowels secured to the horizontal portion of said support member locating said support plate in a predetermined position, means carried by said support member and said support plate for vertically adjusting the bearing means of said second arbor, and means connecting said first and second arbors for driving said arbors in opposite directions.

9. In a machine for the rotary shearing of. metal or the like, the combination comprising a bed plate for said machine having a vertical upright section thereon, a bearing member mounted on said bed plate, an arbor journalled in said vertical section and said bearing member for mounting a set of cutters thereon, a second arbor vertically aligned with said first arbor for mounting a second set of cutters thereon, a support member having a vertical portion detachably mounted on said vertical section and a horizontal portion extending from said vertical portion parallel to said bed plate, a support plate mounted on said horizontal section and. spaced from said bearing member to permit the metal being sheared to pass therebetween, bearing means adjustably mounted in the vertical portion of said support member and in said support plate mounting said second arbor in spaced relation with respect to said first arbor, locating dowels secured to the horizontal portion of said support member locating said support plate in a predetermined position, means including adjusting screws in said support member and said support plate and connected to said bearing means for said second arbor for adjusting said second arbor with respect to said first arbor, and means connecting said first and second arbors for drivin said arbors in opposite directions.

10. In a machine for the rotary shearing of metal or the like, the combination comprising a bed plate for said machine having a vertical upright section thereon, a bearing member mounted on said bed plate, an arbor journalled in said vertical section and said bearing member for mounting a set of cutters thereon, a second arbor vertically aligned with said first arbor for mounting a second set of cutters thereon, a support member having a vertical portion detachably mounted on said vertical section and a horizontal portion extending from said vertical portion parallel to said bed plate, a support plate mounted on said horizontal section and spaced from said bearing member to permit the metal being gsi oss 9 sheared to pass therebetween, bearing means mounted in the vertical portion of said support member and in said support plate mounting said second arbor in spaced relation with respect to said first arbor, means on the horizontal portion of said support member locating said support; plate in a predetermined position, horizontally extending members having longitudinal slots,

therein retaining said bearing plate on said locating means during the shearing of said metal and retaining said bearing plate in a hinged relation with said horizontal portion during the withdrawal of said bearing plate from said locating means for the removal of said cutters from said second arbor, and means connecting said first and second arbors for driving said arbors in opposite directions.

11. In a machine for the rotary shearing of metal or the like, the combination comprising a bed plate for said machine having a vertical upright section thereon, a bearing member adjustably mounted on said bed plate, an arbor journalled in said vertical section and said bearing member for mounting a set of cutters thereon, a second arbor vertically aligned with said first arbor for mounting a second set of cutters there on, a support member having a vertical portion detachably mounted on said vertical section and a horizontal portion extending from said vertical portion parallel to said bed plate, a support plate mounted on said horizontal section and spaced from said bearing member to permit the metal being sheared to pass therebetween, bearing means mounted in the vertical portion of said support member and in said support plate mounting said second arbor in spaced relation with respect to said first arbor, locating dowels secured to the horizontal portion of said support memben locating said support plate in a predetermined position, means including adjusting screws in said support member and said support plate and connected to said bearing means for said second arbor for vertically adjusting said second arbor with respect to said first arbor, horizontally ex-,/ tending members having longitudinal slots therein retaining said bearing plate on said locating dowels during the shearing of said metal and retaining said bearing plate in a hinged relation with said horizontal portion during the withdrawal of said bearing plate from said locating dowels for the removal of said cutters from the second arbor, and means connecting said first and second arbors for driving said arbors in opposite directions.

12. In a machine for the rotary shearing of metal or the like, the combination comprising a bed plate for said machine having a vertical upright section thereon, a bearing member adjustably mounted on said bed plate, an arbor journalled in said vertical section and said bearing member for mounting a set of cutters for said metal thereon, a second arbor spaced from said first arbor and vertically aligned therewith for mounting a second set of cutters thereon, a horizontal bearing member for said second arbor detachably mounted on said vertical section and extending therefrom parallel to said bed plate and spaced from said first mentioned bearing member to permit the metal being sheared to pass therebetween, a variable speed driving means connected to said first arbor, a sprocket on said first arbor, an idler sprocket mounted on 10 said vertical section, a second idler sprocket mounted on said vertical section, a sprocket onsaid second arbor, and an endless drive member encircling said sprockets for driving said arborsand cutters in opposite directions.

13. In a machine for the rotary shearing of metal or the like, the combination comprising a bed plate for said machine having a vertical upright section thereon, a bearing member adjustably mounted on said bed plate, an arbor journalled in said vertical section and said bearing member for mounting a set of cutters for said metal thereon, a second arbor spaced from said first arbor and vertically aligned therewith for mounting a second set of cutters thereon, a horizontal bearing member for said second arbor detachably mounted on said vertical section and extending therefrom parallel to said bed plate and spaced from said first mentioned bearing member to permit the metal being sheared to pass therebetween, a variable speed driving means connected to said first arbor, a sprocket on said first arbor, an idler sprocket mounted on said vertical section, a second idler sprocket mounted on said vertical section and horizontally adjustable with respect to said other sprockets to compensate for changes in said cutters, a sprocket on said second arbor, and an endless drive member encircling said sprockets for driving said arbors and cutters in opposite directions.

14. In a machine for the rotary shearing of metal or the like, the combination comprising a bed plate for said machine having a vertical upright section thereon, a bearing member a djustably mounted on said bed plate, an arbor journalled in said vertical section and said bearing member for mounting a set of cutters for said metal thereon, a second arbor spaced from said first arbor and vertically aligned therewith for mounting a second set of cutters thereon, a horizontal bearing member for said second arbor detachably mounted on said vertical section and extending therefrom parallel to said bed plate and spaced from said first mentioned bearing member to permit the metal being sheared to pass therebetween, a sprocket on said first arbor, a variable speed motor having a sprocket thereon, an endless chain member encircling said sprockets for driving said first arbor, a second sprocket on said first arbor, an idler sprocket mounted on said vertical section, a sprocket on said second arbor, a second idler sprocket mounted on said vertical section and horizontally adjustable with respect to said other sprockets to compensate for changes in said cutters, and an endless drive member encircling the second sprocket on said first arbor, said idler sprockets, and the sprocket on said second arbor for driving said arbors and cutters in opposite directions.

GERALD M. HAMBLETON, SR, ROBERT G. HEINRICH.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 135,266 Crocker Jan. 28, 1873 1,096,733 May May 12, 1914 2,334,645 Plumb Nov. 16, 1943 

